Stove.



F. J. DOYLE.

STOVE.

APPLICATION FILED 0015, 1909. RENEWED JAN. 27, 1913.

1,108,977, Patented Sept. 1, 1914.

2 SIiEETS-SHEET 1.

THE NORRIS PETERS CO, PHOm-LITHQ, WASHINGTON, D. L.

F. J. DOYLE.

STOVE.

APPLICATION FILED OUT. 5, 1909. RENEWED JAN. 27. 1913.

1,108,977, Patented Sept. 1, 1914.

2 SHEETS-SHEET 2.

THE .uRRIS PETERS COIFHDTO-LITHO. WASHINGTON L7. c.

FRANCIS J. DOYLE, OF CHICAGO, ILLINOIS.

STOVE.

Application filed October 5, 1909, Serial No. 521,105. Renewed January To all whom it may concern Be it known that I, FRANCIS J. DOYLE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Stoves, of which the following is a specification.

This invention relates to improvements in stoves, and refers more specifically to a stove provided with a regenerative combustion device which may be embodied either as an attachment or as a feature of the stove as originally constructed.

Among the salient objects of the present invention are, to provide a construction whereby the smoke and coal gases are more perfectly consumed and a higher heating efliciency secured; to provide a construction which conforms approximately to the conventional types of heating stoves now in use in so far as the main body of the stove is concerned so that the invention may be em-- bodied as an auxiliary feature to a heating stove of ordinary construction; to provide a construction in which the main body of the stove is utilized chieliyas a gas distilling device while the principal combustion occurs in the generative device which is located outside of the main body of the stove and is therefore capable of more efiectively radiating the heat generated therein than would be the case were the regenerative device arranged within the main body of the stove; to provide a construct-ion in which the gases of ccmhustirn are causes to circulate through a system of return ,flues arranged in such manner as to effect a more perfect and intense combustion; to provide simple and effective means for supplying heated air to the regencrativc ocvice; in general, to provide a simple and improved construction of the character referred to.

To the above ends the invention consists in the matters hereinafter described and moreparticularly pointed out in the appended claims.

The invention will be readily understood from the following description, reference being had to the accompanying drawings, in which I Figure 1 is an axial vertical sectional view taken on line 11 of Fig. 2 of a stove embodying a preferred form of the invention; Fig. 2 is a horizontal sectional view taken on line 22 of Fig. 1 and looking clownwardly; Figs. 3 and a are views similar. to

Specification of Letters Patent.

Patented Sept. 1, 1914'.

27, 1913. Serial No. 744,591.

Figs. 1 and 2 respectively and showing a modified embodiment of the invention.

Describing first the construction shown in Fig. 1, 1 designates as a whole the main outer casing of a stove body of generally cylmdric shape; the upper and lower ends of the casing being formed by means of top and bottom castingsQ and 8 respectively. Within the lower part of the stove is arranged a concentrically disposed partition member 4 supporting at its upper end an annular casting 5 which serves as a support for the grate 6. The space below the grate constitutes a closed ash chamber, and within this is conveniently arranged an ash receptacle 7. 8 designates a door arranged to control an inlet passage 9 which communicates with the ash pit through the side wall of the stove; the door 8 being provided with a damper 10 whereby the admission of air to the ash pit is controlled. 11 designates a flat annular ring arranged to rest upon the upper edge of the grate support 5 and a corresponding ledge 12 upon the interior of the outer casingl; said ring 11 forming a partial partition which separates the annular space 13 surrounding the ash pit from the upperpart of the stove body. The interior of the upper part of the main body constitutes a fuelchamber 14 with one side of which is arranged to communicate a relatively large eduction pipe 15 which leads to, and communicates with a regenerative device designated as a whole 16. The point at which the pipe 15 communicates with the fuel chamber is preferably located midheight of the latter, and in order to prevent the entrance of fuel to said eduction pipe, and also to secure a peculiar circulation of the products of combustion, a vertically disposed partition member 17 is arranged within the fuel chamber, this partition member I having the form of a channel in cross section and being secured at its edges to the interior of the outer casing, as indicated at 18 so as to inclose the entrance to the eduction pipe. point somewhat below the eduction pipe to a point near the top of the fuel chamber, and both the upper and lower ends of the passage thus inclosed are left open, as shown clearly in Fig. 1. At a point diametrically opposite the partition member 17 is arranged a somewhat similar member 19 which, however, extends from the flat annular ring 11 upwardly to a point near the The member 17 extends from a 7 upper end of the fuel chamber; the upper end of the passage 20 inclosed by this mem-; her being likewise left open. The lower end of the passage 20 is arranged to commun'i cate with the annular space 13 surrounding the ash pit, through an aperture 21 formed.

in the ring 11.

A third partition member 22 somewhat similar to the member 19 is arranged in vertical alineme'nt with, and below the member 17; the upper end of this member 22 being closed except for a seriesof a'ir openings 23 formed therein. The passage 24 formed by the member '22 likewise communicates with the annular space 13 through an air inlet 25, and air is admitted to the annular space 13 around the ash chamber through a series of inlet apertures 26 formed in the bottom casting of the stove body.

Describing now more particularly in detail the construction of the regenerative device 16, the latter is in the present instance shown as comprising an upright cylindric outer shell or"casing 27 with one side of which, at the lower end, the eduction pipe 15 communicates. Arranged concentrically within the outer casing 27 is an inner cylindric member 28, the interior of which constitutes the final combustion space of the device. The lower end of this inner member 28 is open and supported at 29 in a manner hereinafter described, while at its upper end it communicates with an eduction pipe 30.

31 designates a second cylindric member arrangedconcentrically with the inner member 28 and of such diameter as to subdivide approximatelyequally the annular space between the outer shell 27 and the inner member 28. The intermediate member 31 is er considerable less height than the vertical depth or length of the member 28, and

is interspaced so that its upper end is in open communication wlth the upper part of the 'ni'ain chamber outside of the member 28. The lower end of the member 31 is provided with an annular plate ring closure 32 which is provided with a series of inlet apertures 33. The inner member 28 is supported upon this ring closure 32 and registers witha central opening therein. The. member 31 as a whole, lncludlng the plate,

ring closure 32, is arranged to rest upon,

portions 36, surrounding a space indicated at 37 communicatlng with the lower end of the member 28. The fines 36 open at their lower ends through the base plate 35, while at their upper ends they register with the apertures 33 leading into the member 31. i

chamber 14, is downwardly through the passageway formed by the partition member 17, or up through said passageway for such smoke and gases as are created below the lower opening thereof, into the large 'eduction pipe 15, during which passage they have mixed with them supplies of heated air com'ing through the passageway formed by the partition 19 and tl e one designated 24. From the eduction pipe 15 the mixture passes upwardly through the conical flue portions 36 into the intermediate member 31, thence downwardly between the inter mediate member and the outer casing 27, thence inwardly between the conical flue portions 36, thence upwardly through the inner member 28 and finally to the eduction pipe 30.

"38 designates a direct draft passage from the upper part of the fuel or primary combustion chamber 1 1 to the regenerative device 16 and is provided with a damper 39, which may or may not be used as desired. In the large eduction pipe 15 there is provided an opening with closure 10 for cleaning out the various passageways as needed.

In Figs. 3 and i, I have shown modified embodiment of the invention, the general construction of which is similar to that shown in Figs. 1 and 2. The grate ll is supported upon a concentrically disposed partition member 4-2, within the lower part of the stove and forming an ash pit 43. Above the grate is a second concentrically disposed partition member or drum l-l, extending vertically nearly to the top of the main outer casing and forming a primary combustion or distilling chamber 4:5, and also forming an annular space 16 between the main outer casing and drum ale.

l7 designates a flat annular ring arranged to rest upon the outer casing and upon the upper edge of the grate support 42, said ring 17 forming a partial partition which separates the annular space 4E6 from an annular space 18 around the ash pit below the grate, said ring being provided with a series of communicating apertures 49.

50 designates a vertically disposed partition member between the outer casing of the stove and the inner drum or partition member 44 and extending vertically to a height corresponding with that of said and is supported by a casting consisting of a base plate 35, and a plurality of upstanding and upwardly tapering or conical flue drum 1%, said vertically disposed partition member having the form of a channel in cross section and being secured at its edges to the interior of the outer casing, as in the first described embodiments of the present invention. At opposite sides, the inner drum or partition member i4 is cut away, as indicated at 51, to permit a portion of the products of combustion to pass from the fuel upon the grate into the annular space +16, while the main portion of said products of combustion pass upwardly in the distilling chamber 45, thence downwardly through the annular chamber 46, and escape into an eduction pipe 52 mounted upon the outer casing of the stove. In the bottom of the stove is a series of air inlets admitting air to the annular space 48 where it becomes heated and passes upwardly through the openings .49 into the annular space I6 and the channel formed by the partition 50, from which space and channel it is picked up and mixed with the smoke and coal gases from the fuel as they pass into the large eductionpipe 52, This eduction pipe, in the present embodiment, is in the form of a large elbow having a top closure 53, through which and projecting into said elbow is a smaller eduction pipe 5a.

55 designates a cylindric member closed at one end and suspended concentrically within the upright member of the elbow by the rods 56 in such position that the small eduction pipe 5% projects thereinto to within a short distance from the bottom thereof, while the upper edge of said cylindric member is about the same distance from the top or closure of the elbow eduction pipe 52.

It will be seen from the drawings, taken with the description, that in both embodiments, one object sought has been to provide an auxiliary attachment or combustion chamber which can, without great expense, be attached to heating stoves in common use, or embodied in the manufacture of new stoves, and that this auxiliary attachment is of such construction and arrangement that the smoke and gases from the fuel in the primary combustion chamber, instead of beingcarried directly out through the fiue'as usual before being thoroughly consumed, are supplied with heated atmospheric air and carried through a series of successively heated circulating passages within said auxiliary attachment, wherein a more complete and perfect combustion is obtained, thus effecting a great saving in fuel. The primary combustion or distilling chamber, in the present constructions, serves not only to convert the fuel into gases, but the heat therefrom is utilized to heat the supply of atmospheric air as it passes into the device and is mixed with these generated gases from the fuel being consumed.

In the construction shown in Figs. 1 and 2, it will be noticed that the court of circus lation of these mixed gases is upwardly through the conical flue portions 36 and the intermediate member 31, thence downwardly against the outer casing 27, and thence between the conical fiue portions and upwardly through the small eduction pipe 30. In the construction shown in Figs. 2 and 3, the course of circulation is reversed, the first passage upwardly being against the outer casing 52, thence downwardly in the intermediate member 55, and finally upwardly through the small eduction pipe 54. In both instances, however, the products of combustion are caused to circulate through passageways which successively increase in temperature until said products are wholly consumed and discharged through the final eduction pipe.

While I have shown and described what I deem to be the preferred embodiments of the invention, yet it will be understood that alterations and modifications may be made therein without departing from the spirit thereof, and I do not, therefore, limit the invention to the heroin shown and described details of construction and arrangement, except as such details are made the subject matter of specific claims.

' I claim: i

1. In a heating stove, the combination with the grate and outer casing thereof forming the primary combustion chamber, of a par tition member mounted within said casing above said grate and forming with said casing a passage which communicates at both ends with said primary combustion chamher, a second partition member mounted within said outer casing and forming with said casing an air passage which communi- .o'ates with the outer atmosphere at one end and with said combustion chamber at its other end, and an auxiliary combustion chamber mounted upon said stove and communicating with said first passage to receive the gases of combustion therefrom mixed with supplies of heated airfrom said second passage, said auxiliary combustion chamber having a circuitous passageHtherethrough whereby a more complete and intense combustion is maintained during the passage of said gases therethrough.

2. In a stove, the combination. with the grate and outer casing which forms the primary combustion chamber, of partition members within said casing above said grate andforming air passages between said partition members and outer casing, which com-. municate at their upper ends with said primary combustion chamber, one of said partit-ion members being open to admit the gases of combustion from said primary combustion chamber, a partition member within said casing below said grate and forming an air space betweenfsaid partition member and outer casing which communicates with one of said air passagesand with the outer atmosphere, and an auxiliary combustion chamber arranged to receive the gases of combustion and supplies of heated air from said primary combustion chamber and air passages, said auxiliary combustion chamber being provided with a circuitous passage therethrough wherein said gases and air are thoroughly mixed and a more complete and intense combustion takes place, substantially as shown and described.

3. In aheating stove, the combination with the combustion chamber thereof, of an aux iliary" combustion chamber comprising 'an elbow-like member attached thereto and c mnnunicating therewith at one end, said elbow-like member being provided in its upturned portion with a plurality of concentrically arranged partitions forming a circuitous passage therethrough and discharging into an upwardly leading eduction'pipe, means for feeding heated air to the of combustion as they pass into said auxiliary combustion chamber, wherebya more complete and intense'combustion is had, and a'direct draft communication between the upper portion of said "auxiliary combustion chamber and the combustion chamber of said stove, said draftcommu nication beiiig'provided with a manually operable damper, substantially as shown and described. l; Ina heating stove, the combination with an outer "casing forminga primary combustion chan'i'be'r,- a grateat the lower end of said chamber for receiving the fuel to be burned, a flue running upwardly through said combustion chamber and communicating at its upper end with the top of said combustion chamber and at its lower end with the atmosphere, a second flue within said chamber communicating at itsupper end with the upper endof said chamber and terminating at its lower endnear said grate and the burning fuel thereon, the hot products of combustion fiowing directly into the lower'end of said second fine, and the air from said firstflue flowing through the top ofthecombustion chamber to mingle with the gas driven from said fuel to the upper part of said chamber and to flow with said gas into the second fine to mingle with the hot products of combustion flowing into the lower end of said second flue, and an auxiliary combustion chamber communicating with said second fine and providing a 'circuitouspassageway to "cause more thorough mixture andcoinbustion of the mixture of gas, an and hot products of combus ion received from said second flue. i

'5. In aheating stove, the combination with an outer casing forming a primary combustion chamber, a grate "at the lower end of said chamber for receiving fuel to be burned, a fine running upwardly through sai'd'combustion chamber and communicating at its upper end with 'the top of said combustion chamber and at its lower end with the atmosphere, a second flue within said chamber communicating at its upper end with the upper end of said chamber and terminating at its lower end near said'grate and the burning fuel thereon, the hot products of combustion flowing directly into the lower end of said second flue, and the air from said first flue flowing through the top of the combustion chamber to mingle withthe gas driven from said fuel to the upper part'of' said chamber and to flow with said gas into the second iiu'e to mingle with the hot products of combustion flowing into the lower end of said second flue, an auxiliary combustion chamber communicating with said second fine and providing a circuitous passageway to cause more thorough 'nixture and combustion of the mixture of gas, air and hot products of combustion received from said second flue, and an air chamber adjacent the burning fuel for heating the air flowing through said first flue.

6. In a heating stove, the combination of an outer casing forming a combustion chamber, a grate at the lower part of said chamberfor supporting fuel to be burned, a flue extending through said combustion chamber and communicating at its lower end below the level of the grate with atmosphere and at its upper end communicating with the upper part of the combustion chamber to supply air to mingle with the gases driven upwardly from "the heated fuel, a second flue within the combustion chamber terminating at its lower end near said grate and adjacent the burning fuel on said grate to directly receive hot products of con'i-bustion from the" burning fuel, a passageway connecting at its lower end with atmosphere below the grate level and terminating at its upper end'fat the lower inlet to said second-flue to supply air to the hot products'of combustion as they enter the lower end of said flue, said second flue being also open at itstop to the upper part of the combustion chamber to receive the mixture of air and gas from the upper part of said combustion chamber, and an auxiliary combustion chamber carried by the outer casing and communicating with'sa-id second flue to receive the mixture of air, gas, and hot products of combustion, there being a circuitous passage through said auxiliary combustion chamber through which the mixture of gas, air and hot products must flow to be more'thoroughly mixed and more completely 'bu'rne '7. In a heating stove, the combination of an outer casing forming a combustion chamber, a grate at the lower end of said casing for supportingfuel to be burned, a flue communicating with the upper end of said combustion chamber to receive the gases driven upwardly from the burning fuel on said grate, said flue terminating at its lower end near the grate and adjacent the burning fuel thereon to directly receive the heated products of combustion from the burning fuel,an air passageway for supplying air from below the grate level to the lower entranceof said flue to mix with the hot' products ofcombustion from the fuel as they enter the lower end of said flue, thoroughly mixed and the gases completely and an auxiliary combustion chamber comburned.

municating with said flue to receive the mix- FRAN I D YLE ture of gas, air and hot products of com- 0 S O bustlon, said auxiliary COIIlbHSt-lOIl chamber Witnesses:

having a clrcultous passageway through JULIA M. BRISTOL,

which the mixture must flow to be more WILLIAM R. LITZENBERG.

Copies of this patent may be obtained for five cents each,, by addressing the Commissioner of Patents,

Washington, D. C. 

